#! /usr/bin/env python
# -*- coding: utf-8 -*-
#
# Copyright 2020-2023 Alibaba Group Holding Limited.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#

from vineyard._C import Object


class Graph:
    def __init__(self, object_or_meta):
        if isinstance(object_or_meta, Object):
            self.meta = object_or_meta.meta
        else:
            self.meta = object_or_meta

    def attr(self, key, default=None):
        return self.meta.get(key, default=default)


def vineyard_graph_resolver(obj):
    return Graph(obj)


def register_graph_types(_builder_ctx, resolver_ctx):
    if resolver_ctx is not None:
        resolver_ctx.register('vineyard::Graph', vineyard_graph_resolver)
